Optical transport networks must support numerous service demands, from low-rate DS-1/T1, DS-3/E3, 10/100BASE-T, and OC-3/STM-1 to higher-rate OC-12/STM-4, Gigabit Ethernet, OC-48/STM-16, OC-192/STM-64, and 10 Gigabit Ethernet services. In the recent past, SONET add-drop multiplexers (ADMs) provided the services platform to aggregate and transport services up to OC-48/STM-16, whereas dense wavelength-division multiplexing (DWDM) platforms were designed for optical signals from OC-3/STM-1 to OC-192/STM-64, including Gigabit and 10 Gigabit Ethernet. Unfortunately, deploying multiple platforms (including DWDM and SONET ADMs) to support multiple services is not cost-effective for many service provider and enterprise networks. The Cisco ONS 15454 MSTP, with transponder, muxponder, and Xponder cards, provides a more cost-effective networking solution to enable the delivery of all services, from lower-speed DS-1/E1 to high-density 2.5 Gbps and high-bandwidth OC-192/STM-64.

Product Overview

The 10-Gbps Full-Band Tunable Multirate Transponder Card can transport 10 Gigabit Ethernet WAN physical layer (PHY) and LAN PHY, 10-Gbps Fibre Channel (10G FICON), SONET OC-192, and SDH STM-64 services over a 50-GHz spaced, 50-GHz stabilized, ITU-compliant wavelength. The transponder card is a plug-in module to the Cisco ONS 15454 MSTP, enabling a cost-effective architecture for delivering high-rate 10-Gbps services as well as low-rate services down to 1.5 Mbps. The transponder card architecture contains a single client interface that is mapped to a single line interface, without accessing the Cisco ONS 15454 shelf cross-connect fabric.

●Low-latency data center applications: SAN protocols, such as Server Time Protocol (STP), are extremely sensitive to additional latency introduced by CD optical fiber.

●Enterprise point-to-point applications: Installation costs for the dispersion compensation unit (DCU) and fiber can be avoided. This is particularly important in low-end markets, where DCU can comprise up to 10 percent of simple point-to-point systems cost.

●Ultra-long-haul (ULH) applications: Improvement in CD and PMD performance can be translated into better ULH performance. Additional OSNR margin can be allocated to compensate for non-linear effects (NLE) impairment, allowing for better system performance.

The 10-Gbps Full-Band Tunable Multirate Transponder Card incorporates both a client and DWDM line interface on the same card. The 10-Gbps full-band tunable transponder cards are deployable in the 12 multiservice interface card slots of the Cisco ONS 15454 platform, in systems with or without cross-connect cards. The addition of a cross-connect card enables the platform to support hybrid applications, containing transparent 10‑Gbps services as well as aggregation of other services supported by the Cisco ONS 15454 platform. The only required common card is the appropriate timing, communications, and control card (TCC).

An important feature of the transponder card is the availability to configure the Forward Error Correction (FEC) in two modes: FEC and Enhanced FEC (E-FEC). The output bit rate will depend on the bit rate of the incoming signal but the digital wrapper will be always as defined in G.709.

●E-FEC: standard G.975.1 two orthogonally concatenated BCH super FEC codes. This FEC scheme contains three parameterizations of the same scheme of two orthogonally interleaved block codes (BCH). The constructed code is decoded iteratively, to achieve the expected performance.

Protocol Transparency

The transponder card provides transparent wavelength services on the Cisco ONS 15454 platform. For SONET- or SDH-based client payloads, when provisioned in transparent operating mode, the card will pass all of the SONET/SDH overhead bytes transparently. The card monitors important SONET/SDH overhead bytes, such as B1 (section BIP-8) and J0 (section trace), to allow fault isolation and performance monitoring capabilities. Termination of the line data communications channel (LDCC) is user-provisionable, to enable the platform processor to route the DCC information for intra-carrier networking or to allow the DCC information to be transported untouched, via the digital wrapper’s general communications channel (GCC), for inter-carrier networking. For 10 Gigabit Ethernet and OC‑192/STM-64 payloads, digital wrapper technology (G.709) is used to add a management wrapper to the service, allowing the transponder card to transparently forward the payload while enabling performance metrics to be derived to ensure circuit service quality.

The transponder card is transparent to the embedded payload and does not access the Cisco ONS 15454 platform’s cross-connect. It can carry any type of concatenated SONET/SDH payloads (STS-Nc or VC-4-Mc); non-concatenated payloads on an STS-1, VC-4, VC-3, VC-12, or VT1.5 basis; and 10 Gigabit Ethernet LAN or WAN PHY payloads.

Wavelength Tunability

The transponder card operates on the 50-GHz ITU grid and it is tunable across the full C-band, on 50-GHz channels. Tunability reduces the amount of inventory and spares required to cover all of the wavelengths. Tunability is software-provisionable.

No client terminal interface, transponder card, or DWDM line protection. The client signal is transported over a single unprotected transponder card. This configuration is suitable for transporting client payloads over a DWDM network that is being protected via unidirectional path switched ring/subnetwork connection protection (UPSR/SNCP) or bidirectional line switched ring/multiplex section shared protection ring (BLSR/MS-SPR) protocols.

The transponder card allows the timing to “flow through” from client to line optical interfaces. Receive timing from one interface (client or line) is used to time the other transmitter interface (line or client). This flow-through timing enables the transported signal to remain independent from the node timing.

Management

The Cisco ONS 15454 MSTP provides comprehensive management capabilities to support the operations, administration, monitoring, and provisioning (OAM&P) capabilities through the integrated Cisco Transport Controller craft interface with support from the Cisco Transport Manager element management system (EMS). The 10-Gbps Full-Band Tunable Multirate Transponder Card incorporates provisionable digital wrapper (G.709) functions, providing per-wavelength performance management capabilities, especially for services being transported transparently across the network. Without the digital wrapper functions, a carrier transporting a service transparently would be unable to identify network impairments that may degrade the transported signal and exceed SLA requirements. The digital wrapper’s GCC enables a separate communications channel on a per-wavelength basis, versus the section DCC/regenerator section DCC (SDCC/RSDCC) in SONET/SDH signals that is used by the platform when transparent signals are transported. This GCC enables the Cisco ONS 15454 to extend its advanced network auto-discovery capabilities to DWDM-based services. The integrated Cisco ONS 15454 Transport Controller craft manager and the Cisco Transport Manager EMS provide the user with OAM&P access for the system.

Configurable Far-End-Laser-Off Behavior

The 10-Gbps Full-Band Tunable Multirate Transponder Card offers the flexibility to provision the Far-End-Laser-Off behavior. You can use Cisco Transport Controller to configure how the remote client interface will behave following a fault condition. It is possible to configure the remote client to squelch or to send an alarm indication signal (AIS).

Performance Monitoring

The performance-monitoring capabilities of the 10-Gbps Full-Band Tunable Multirate Transponder Card provide support for both transparent and nontransparent signal transport. For SONET/SDH-terminated signals, standard performance-monitoring and threshold-crossing conditions and alarms are supported per Telcordia GR-474, GR-2918, ITU G.783, and ETS 300 417-1 standards. For 10 Gigabit Ethernet signals, standard performance parameters for transmit and receive signals are based on RFC 2819. Each digital wrapper channel will be monitored per ITU-T digital wrapper requirements (G.709). Optical parameters on the DWDM line interface are supported, including laser bias, transmit optical power, and receiver optical power. Calculation and accumulation of the performance monitoring data will be in 15-minute and 24-hour intervals.

The transponder card incorporates faceplate-mounted LEDs to provide a quick visual check of the operational status of the card. An orange circle is printed on the faceplate, indicating the shelf slots the card can be installed.

10 Gigabit Ethernet connectivity (Figure 5): With the addition of 10 Gigabit Ethernet on data terminals, the need for service providers to add a 10 Gigabit Ethernet transport service becomes critical to provide a complete metro service portfolio to their customer base. The 10‑Gbps transponder card helps enable service providers to cost-effectively integrate 10 Gigabit Ethernet into their service mix over a multiservice network, reducing the need to deploy an overlay DWDM platform, and reducing the cost to deploy the service.

Figure 5. 10 Gigabit Ethernet Connectivity

STM-64 transport for cable-landing service extension (Figure 6): A second application is the capability of a carrier’s service provider (Service Provider A) to transport STM-64 payloads from a transoceanic cable-landing site to another service provider’s international gateway site (Service Provider B).

Figure 6. STM-64 Transport for Cable Landing Service Extension

OC-192/STM-64 transport for carrier services (Figure 7): The OC-192/STM-64 transport for a carrier’s carrier services application is similar to the application outlined in Figure 6.

Figure 7. OC-192/STM-64 Transport for a Carrier’s Carrier Services

In each of these applications, the user can provide several service types, from DS-1/E1 to 10-Gbps services, using a single transport platform such as the Cisco ONS 15454 MSTP. This capability helps reduce system complexity, capital expenditures, and operational expenses related to technician training.

1. All compliance documentation may not be completed at the time of product release. Please check with your Cisco sales representative for countries outside of Canada, the United States, and the European Union.

Table 3.System Requirements

Component

Cisco ONS 15454 ANSI

Cisco ONS 15454 ETSI

Cisco ONS 15454 M6

Cisco ONS 15454 M2

Processor

TCC31, TCC2P and TCC2

TCC31, TCC2P and TCC2

TNC, TSC, TNC-E2, or TSC-E2

TNC, TSC, TNC-E2, or TSC-E2

Cross-connect

All (not required)

All (not required)

-

-

Shelf assembly

15454-SA-HD or 15454-SA-HD-DDR shelf assembly with CC-FTA or FTA3 version fan-tray assembly

1. The TCC3 card is supported on the Cisco ONS 15454 DWDM systems from Rel 9.2 onwards. However, it is backward compatible with software Release 9.1 and earlier releases. In the Release 9.1 and earlier releases, the TCC3 card boots up as the TCC2P card in the Cisco ONS 15454 DWDM systems.

2. The TNC-E and the TSC-E cards are supported on the Cisco ONS 15454 M6 and M2 DWDM systems from Rel 9.3 onwards

5% to 85%, non condensing 5% to 90% but not to exceed 0.024 kg water/kg of dry air

1. Short-term refers to a period of not more than 96 consecutive hours and a total of not more than 15 days in 1 year. (This refers to a total of 360 hours in any given year, but no more than 15 occurrences during that 1-year period.)

NOTE: Transponders equipped with LR2 XFP need to be placed in a high-speed slot (5,6,12, or 13) if the shelf is equipped with an FTA-3 or FTA-48V fan tray. No limitation if the shelf is using a CC-FTA fan tray.

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